Dog hives typically look raised, red, and either uniformly round or merged into an irregular shape. A skin infection rash often features tiny pimple-like bumps (pustules) or flat red crusty ...

And, because of their vibrant color, they’re sometimes visible on the skin. Bites from chiggers typically appear as clusters of small, red bumps that itch, MedlinePlus explains. The bites might ...

Fleas typically attack dogs and cats ... Common symptoms of flea bites include having small, red, itchy bumps. Bumps and rashes can cause skin irritation. In some cases, skin swelling may occur.