it is VERY uncommon for the rabies vaccine to be given in the scruff of the neck. It is supposed to be given in the right hind leg, as far down as they can get it. The rabies vaccine is the mostly likely to cause a fibrosarcoma at the injection site and this mostly happens in cats. Its also most likely to cause any other reactions ranging from milk to severe. Because it can be highly reactive it is given in the same spot on every patient (dogs and cats) so if there is a localized problem from a vaccine the vet can tell which vaccine is the culprit.
Its odd also that it took a week for your dog to have a reaction. pain at the injection site usually happens within a day of the vaccine as well as the little lump and is gone in a week or so.
It is also mandatory by law in most states to get the rabies vaccine unless you have a written statement by your vet that your pet cannot get the vaccine due to an illness or severe reaction.
__________________ Kellie  and  Morgan |