Why is my dog acting strange after recent vaccines and medication?

Thank you for submitting your question regarding Moki. He sounds painful based on the signs you have described. This is most common after vaccinations in small breed dogs. I would recommend contacting your veterinarian this morning. If his physical exam did not reveal any other source of pain, then it is likely due to the vaccine. His veterinarian will likely prescribe a pain medication for him. Do not give any over-the-counter pain meds. I hope this information helps!

Sometimes vaccines can cause dogs to feel a bit groggy, a bit like a person getting their inoculations. However it doesn't tend to be that pronounced. Dogs are very sensitive to new environments and stress so so wouldn't be surprised if a lot of it is down to the changes occurring. Whilst he is eating and drinking normally I wouldn't worry too much. However if he deteriorates or dies not return to his usual self in a few days it would be best to get him examined.

Hi and thank you for using Petco Pet Education Center, formerly Petcoach. He may be having a vaccine reaction. Sometimes it can be painful at the injection site and dogs can be sore. I would recommend calling your veterinarian tonight and letting them know that Wolfie is not feeling great. They may prescribed him some anti-inflammatory medication, fluids or anti-nausea medication to help him feel a little better. Good luck!

Hi. It is normal to be lying around after vaccines. He may bring sore and lethargic. I'm not sure why he is growling, unless he just wanting to be left alone from being sore. He would need to be seen if there is vomiting, hives, swelling, or trouble breathing. Good luck

It is safe to vaccinate a dog without prior proof of vaccination, and if he was a stray, I would suspect he wasn't vaccinated. Lethargy can be a side effect of the vaccines, but it could also be due to the fact he's in a new place and that's stressful. Keep an eye on him, and if he's still acting this way in another 24-48 hours, have him see by a vet. Best of luck.

I'm sorry to hear that Lettie is not feeling like her usual self! It should be noted that even normal puppy vaccines can lead to some side effects such as lethargy (decreased activity, tiredness), swelling or tenderness around the injection site and even mild nausea (possibly the drooling). That being said, rarely dogs can undergo an allergic reaction to vaccines which often show up as vomiting, collapse, and swelling of the face or other limbs. If these have been observed she should be seen by a veterinarian immediately. In regards to the safety of administering the Heartguard and Nexgard along with the vaccines, it is standard protocol to begin these preventative medications at this time and are safe to give to a puppy of Lettie's age. The most important thing going forward is to continue to monitor Lettie for any worsening or changing of her clinical signs. For example, if she starts to vomit becomes even more tired or lethargic, continues to want to eat or do anything after more than a day, or even have swelling around her face then she needs to be seen by a veterinarian immediately.

I'm sorry Milli isn't feeling well! It's relatively common for dogs to feel lethargic or sore after vaccines. It usually resolves on its own within 24 hours. If she has any vomiting, diarrhea, facial swelling or hives I would take her to the vet right away. Otherwise, make sure she has access to water but I'd call your vet tomorrow if she's not back to normal by then.