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Welcome! I am Dr. Altman, a licensed veterinarian and happy to answer your questions today.
Yes this can be a normal reaction in some dogs
Just as when babies get their immunizations and are sore and feverish after vaccinations, puppies can have the same reaction
Vaccinations are intended to stimulate the immune system to respond and when the body is reacting normally, some dogs will be sore, lethargic, and slightly feverish for 24-48 hours after vaccinations
I definitely would notify your veterinarian of this activity change on Monday for future reference but it should pass within another 24 hours
You can also try 1 mg/ pound benadryl to help but this might cause further sedation for Kenji
Please let me know if I can be of any further assistance you both!
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I have benadryl but do you mean give him 1mg per pound?
How much does Kenji weigh and what mg do you have?
You are very welcome
Kenji weighs 29.9 pounds
So he would take one adult 25 mg benadryl every 8-12 hours as needed
But this might initially cause further sedation
This will resolve but it can help with some of the soreness of vaccinations
Can I assist with any additional questions this evening?
Okay, and if he is not better I have contacted his vet.
Yes but even if he is back to normal tomorrow they should have a record of the lethargy/ malaise post vaccination for next year
But I suspect he will be feeling better by tomorrow afternoon, Monday at the latest
You are welcome
Good luck to you and Kenji!