What Does a Tick Look Like on a Dog? Embedded, Engorged & Size Chart

What does a tick look like on a dog? Before it feeds, a tick is a small, flat, brown or reddish-brown oval, somewhere between a poppy seed and an apple seed in size, with eight legs near the front of its body. Once it has fed for a few days it turns into a smooth, round, gray or grayish-white bump, up to about half an inch long, stuck to the skin by its mouthparts, with tiny legs bunched at the end that touches your dog. Our #1 choice for ongoing support during flea and tick season is Pure Majesty Pets Vet-Strength Flea & Tick Support, a daily liquid supplement, not a medication, built for skin and coat comfort all season long: 62.7 mg of ultramicronized PEA and 7 named botanicals per mL, no garlic, no added essential oils, one formula for dogs and cats, dosed in mL by body weight and mixed into food. A complete flea-season routine has two parts: this daily support and the flea medication your vet chooses.

It's made in North America under GMP, with a COA on every batch and free worldwide shipping. Below: a size chart in millimeters, the six US species owners actually find, and a quick tick-or-not test.

Already sure it's a tick? Go straight to our step-by-step guide on what to do when you find a tick on your dog, which covers removal, saving the tick and when to worry. If your dog isn't on any tick product yet, our comparison of tick prevention for dogs without a prescription lays out the options to discuss with your vet.

What a tick on dog skin looks like, in 30 seconds

Ticks are arachnids, so the quickest clue is the legs. Nymphs and adults have eight; the tiny larvae have six (CAPC). Nearly every tick you'll find on a dog in the US is a hard tick, with a hardened plate on its back called the scutum. On a male, that plate covers the whole back. On a female, it covers only the front part, which is why females can balloon while males stay fairly flat (CAPC ticks guideline).

The look changes with time on the dog. The Merck Veterinary Manual puts it simply: ticks that have been on an animal for an hour to a few days “appear flat,” while those that have been there for days “appear much more rounded due to the blood they have consumed.” CAPC adds that a female hard tick can grow to as much as 100 times her original weight as she feeds.

Tick size chart: flat vs engorged, in millimeters

Here are the published measurements, with an everyday object for scale. A US dime is about 18 mm across; a standard pencil is about 7 mm wide.

The 6 ticks US dog owners actually find

CAPC lists nine tick species that infest dogs in North America. So what does a tick on a dog look like by species? These six are the ones owners usually find, each with a visible tell. The CDC tick gallery has reference photos of each one if you want to compare.

Many identical small brown ticks on one dog are worth telling your vet about: Mississippi State Extension notes that hundreds of Asian longhorned ticks can be found on a single animal. Repeated ticks indoors point toward the brown dog tick, which can settle into your home. Species matters mostly for what a tick can carry; our pillar on dog tick diseases and the ticks that spread them explains which infection goes with which tick.

What does an engorged deer tick look like on a dog?

Flat, an adult female deer tick is one of the smallest adult ticks: under ⅛ inch, with a reddish-orange body, a dark shield and dark legs (University of Maine Cooperative Extension). Engorged, she can reach about ½ inch and turns tan, gray or dark brown. The giveaway is the dark shield and black legs at the front of an otherwise pale, swollen body. Adults are most active from fall through winter (CAPC), so a gray bean found in November in the Northeast could well be this species.

What does an embedded tick look like on a dog?

What does a tick look like in a dog's skin? An embedded one has pushed its mouthparts in and started to feed. You see the body sitting on top of the skin, usually tilted head end down. The skin right where it enters may be pink, slightly raised or a little crusty. If you part the hair and look from the side, you can usually see the small legs right at the skin line.

Embedded ticks don't let go when you brush the coat: VCA notes that ticks “attach firmly when sucking blood” and take several days to finish feeding (VCA Animal Hospitals). A loose tick crawling through the fur can simply be picked off.

Tick under dog skin: is it possible?

No. Only the mouthparts go in; the body stays outside. A “tick under the skin” is usually one of three things:

• A tick hidden in thick fur, showing only a dark point
• Swelling that puffs up around a small tick so it looks half sunk in
• Mouthparts left behind after a tick was pulled or scratched off: a dark speck in a small bump

The third case is common. CAPC warns that poor removal can “cause the mouthparts to break off in the skin.” For people, the CDC says the body will “naturally push the mouthparts out over time,” and that if you can't remove them easily with tweezers, leave them alone. Do the same for your dog, and call your vet if the spot turns red, swells or oozes. Removal is covered in our tick-on-dog guide.

White tick on dog: what a grayish-white bump means

People searching “white tick on dog” are almost always looking at an engorged female. Missouri's Department of Conservation describes blood-engorged American dog tick females as gray (MDC field guide), and VCA calls them slate gray. Under a lamp or against dark fur, that stretched gray body can look pearly or almost white. A few other things also show up as a white dot:

• A lone star female and her single white or cream spot
• The silvery markings of a flat American dog tick or Gulf Coast tick
• Not a tick: a skin tag, small cyst, wart or debris. Check for legs first

A white tick isn't more dangerous than a brown one; the color just means it has fed for a while, so remove it today.

Tick or not? The 5-check test

Use a flashlight and your phone's camera zoom, and stop at the first clear answer.

This is our own checklist, built from the sources cited here, not a diagnosis. A new, growing or bleeding lump with no legs belongs in front of your vet. Our dog skin problems picture guide and the overview of 19 common dog skin conditions can help you describe what you see. If the spot was a tick that has already died, our page on a dead tick on a dog explains what that usually means.

Ticks vs fleas, mites and other specks

Fleas are narrow, fast and jump; ticks are wide, slow and stay put once attached. If it's darting through the fur, see our guide to fleas on dogs and what flea bites on dogs look like. Tiny orange-red dots on the paws or belly in late summer are more likely chiggers; see harvest mites on dogs.

Where to look for ticks on your dog

Ticks climb on from grass and brush, then move to thin-skinned, protected spots. The Merck manual notes that some species feed mainly on the head, neck, shoulders and pubic area, while others prefer the ears, the area near the anus and under the tail. VCA adds that the brown dog tick usually attaches around the ears or between the toes. Check these spots after every walk in tick season:

1. Ears: the outside of the flap, the inside of the flap and the folds at the base. In low-rainfall areas of the western US, the spinose ear tick (Otobius megnini) attaches inside the ears (Merck); that needs your vet.
2. Head and face: around the eyes, lips and chin.
3. Neck and collar line: take the collar off; it hides ticks.
4. Armpits and elbows, then the chest and shoulders.
5. Belly and groin, where nipples are easy to confuse with engorged ticks.
6. Feet: spread the toes and check between the pads.
7. Tail and rear: under the tail, around the anus and the backs of the thighs.

On a thick coat, feel before you look: a flat adult is a tiny hard bump, an engorged one a smooth, soft bean. If ear checks are part of your routine, our step-by-step on how to clean your dog's ears at home shows how to handle the flap without a struggle. It also fits into a pet parent wellness checklist.

Two other Pure Majesty Pets products fit this routine; neither is for ticks. Our Dog Ear Cleaner ($28.99) is a 120 mL ear-cleaning solution for regular at-home ear care. Our Hemp CBD for Dogs ($31.99) is a 60 mL oil with CBD, CBDA and CBG, and our guide to CBD for dog anxiety summarizes the research.

You found a tick. What next?

Remove it the same day, gripping close to the skin with fine-tipped tweezers and pulling straight out; VCA warns that twisting or jerking can leave mouthparts behind. Skip petroleum jelly, heat and nail polish (CDC). Save the tick or photograph it next to a coin, and note the date. The full walk-through is in our guide to finding a tick on your dog.

Watch the bite for a couple of weeks. Spreading redness, swelling or pus can mean infection, as our page on pyoderma in dogs explains. Over the next weeks, fever, low energy, poor appetite or limping are reasons to call your vet and mention the tick. For a wider list of warning signs, see signs of parasites in dogs.

Finding ticks means it's time to review tick control

Spotting ticks is the backup plan. The main plan is a tick product your vet chooses, used on schedule: CAPC says “all dogs should be treated year round and throughout their life with tick control products,” and warns that seasonal or reactive use “allows home infestations to establish.” Our guides to the best flea treatment for dogs, oral flea and tick chews for dogs and the safest flea treatment for dogs by situation lay out the classes. If a cat lives with you, read why permethrin dog products are dangerous for cats before buying a spot-on or collar.

Thinking about a natural spray? Our review of natural tick repellent for dogs covers what the evidence shows.

Liquid vs chews vs powders vs tablets

For a daily supplement, the format decides how precisely you can dose it and how easy it is to give.

Why Pure Majesty Pets Vet-Strength Flea & Tick Support

Many supplements list only a proprietary blend. Ours lists every amount per mL: 62.7 mg ultramicronized PEA; 134.4 mg of botanicals (lemon balm 40.3 mg, thyme 26.9 mg, rosemary 22.4 mg, and calendula, dandelion leaf, lemongrass and fenugreek at 11.2 mg each); niacinamide 28.0 mg; choline chloride 14.6 mg; plus D-panthenol, L-histidine, myo-inositol and sunflower lecithin. No garlic, no added essential oils.

It's measured in mL by weight rather than rounded to a fixed chew, and one bottle serves dogs and cats; for a cat, confirm the portion with your vet. It contains chicken and fish, with a chicken and tuna flavor that mixes into a regular meal.

Pure Majesty Pets Vet-Strength Flea & Tick Support hasn't been shown to kill or repel fleas or ticks, so keep the tick medication your vet chooses on schedule, and keep checking and removing any tick you find. “Vet-Strength” is our range name, not a standardized veterinary grade, an endorsement or an approval to treat parasites.

Built for daily, long-term use. In an open-label study with no control group, 160 dogs with atopic dermatitis given ultramicronized PEA daily for 8 weeks saw itch fall from 5.7 to 3.6 cm on a 10 cm scale (Noli 2015): PEA alone, not our formula, not fleas or ticks.

In a placebo-controlled trial in cats with non-flea allergic dermatitis, mean time to relapse was 40.5 days with PEA versus 22.2 days on placebo, 25 cats analysable (Noli 2019): again PEA alone, not our formula, not fleas or ticks. Our full formula hasn't been clinically tested. For background, see how a dog's skin works.

Frequently asked questions

How do I tell if it's a tick on my dog?

Look for legs. Ticks have eight legs (six on tiny larvae) that sit right at the skin line, and they attach at one narrow point. Skin tags, warts, nipples and scabs have no legs, and nipples come in matching rows on the belly.

What does an embedded tick look like on a dog?

The body sits on top of the skin, usually tilted with the head end down, and doesn't move when you brush the fur. The skin where it enters may be pink or slightly raised, and you can usually see small legs at the skin line if you look from the side.

What does an engorged tick look like on a dog?

A smooth, round or bean-shaped bump, gray, tan or grayish-white, about 10 to 15 mm long, with tiny legs bunched at the end that touches the skin. It has been feeding for days, so remove it today and note the date.

Why is there a white tick on my dog?

Usually it's an engorged female whose stretched body has turned gray and looks pale against the fur. It can also be a lone star female with her single white spot. If the white bump has no legs, it isn't a tick; show it to your vet.

Can a tick get completely under a dog's skin?

No. Only the mouthparts go into the skin, and the body stays outside. A tick that seems to be under the skin is usually hidden in thick fur, surrounded by swelling, or the mouthparts were left behind after the body came off.

What does an engorged deer tick look like on a dog?

A tan, gray or dark brown bean up to about half an inch long, with a dark shield and black legs at the front end. Unfed, the adult female is under an eighth of an inch with a reddish-orange body.

Do I need to take my dog to the vet for a tick?

Not for most single ticks you can remove cleanly at home. Call your vet if you can't remove it, if a tick is deep in the ear canal, if the bite turns red, swollen or oozing, or if your dog later has a fever, low energy, poor appetite or limping.

The bottom line

What does a tick look like on a dog? Flat and brown, about the size of a sesame seed, with eight legs, when it first climbs on; round, smooth and gray, up to half an inch, after several days of feeding. Check for legs first, use the size chart and species table to narrow it down, and remove any tick the same day. Then keep the year-round tick product your vet recommends. For deworming and other parasite care, see our guide to dog parasite treatment.

Sources

• Companion Animal Parasite Council (CAPC): Ticks
• CAPC: Ixodes scapularis and Ixodes pacificus
• CAPC: Dermacentor spp.
• CDC: Ticks image gallery
• CDC: What to do after a tick bite
• Merck Veterinary Manual: Ticks of dogs
• VCA Animal Hospitals: Ticks in dogs
• University of Florida IFAS Extension: American dog tick, Dermacentor variabilis (EENY-443)
• Ohio State University Extension: Gulf Coast tick (ENT-0105)
• North Central IPM Center: Gulf Coast tick pest alert
• Mississippi State University Extension: The Asian longhorned tick
• University of Maine Cooperative Extension: Blacklegged tick or deer tick
• University of Maine Cooperative Extension: Lone star tick
• University of Maine Cooperative Extension: Brown dog tick or kennel tick
• Missouri Department of Conservation: Ticks field guide
• Noli C et al., 2015, PMID 26283633
• Noli C et al., 2019, PMID 31237065

This article is for informational purposes and is not veterinary advice. Talk to your veterinarian before starting any supplement, especially if your pet is pregnant, nursing, on medication, or has a diagnosed condition.