Question:
my mom took my dog to the park the other day and now she has large red bumps on her bellly and chest now...what could cause them...she has a vet appt tomorrow

Answer:
Maybe she is allergic to some type of weed or grass, or the park was sprayed with some chemical, if a city park, you should be able to contact the city and check if they did use some kind of ground treatment like a fall weed and feed and with what.

Answer:
Not sure where you are placed on the planet but could they be an insect bite ? Bees, spiders ? They can all leave large red mounds and if your puppy is allergic to the insect toxin, a "normal" bite would cause a distorted looking result.

Answer: