I have seen reactions like this to flea meds and flea collars. My sister once rescued a kitten off the street and someone had put a flea collar on it. The kitten was too young for a collar and was having a very bad reaction when they found it. I'm just throwing this out there...If you are unsure of any meds. that this pup might have been on before you brought him home then please be careful. I would wait 30 days from the day you got him to give flea or heartworm unless you really know when he last had it.
__________________ Hannah's Mom |