Possible Spider Bite On Puppy. Not eating wet food, yelps when tries to stand, extremely lethargic, swollen inner thigh/stomach, dry nose, pain in legs but nowhere else (we can get him to eat treats, dry food and drink water) duration: A normally energetic dog, for example, may become lethargic.
Usually, in not so serious cases, the swelling will die down in about 24 to 48 hours. He lists the following as possible symptoms of spider bites on dogs: What to do if a puppy gets bite by a spider?