The booster shots will make your dogs condition worse if he was unwell after his first shots. In fact allergic reactions are more common after booster shots.
The veterinarian must be informed about all of your dogs symptoms including shaking after the first shot. Your vet may recommend against booster shots in some cases.
The vet might also decide to space your dogs booster shots allowing one or two weeks between injections.
Often dog inoculations contain several vaccines in one injection and this can overwhelm the dogs immune system.
When small dogs receive the same vaccine dose as larger dogs the problem is more severe. German Shepherds will be able to tolerate the vaccine much better than little Chihuahuas.
Small dogs are perfectly safe to receive the same shots as large dogs according to experts.
If your dog had an adverse reaction to his first round of shots you need to speak with your vet about the common canine diseases in your area.
The doctor may decide which vaccinations you can skip if theres a low risk of catching one or another disease.