I recently purchased a collie puppy. The breeder said not to use heartguard because of a reaction in collies. When I took her to the vet for her shots, the vet said it was okay to use heartguard. I am a little concerned about this conflicting advice,and I don't know who to believe.
It is safe to use heartguard on collies. The dose is too small and will not hurt them. The active ingrediant in heartguard is ivermectin and this is toxic to collies, but not the dose in heartguard. Your vet is correct. Thanks, vetcare