Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am so sorry to hear about your situation...this is not uncommon because the vets office is a very fearful place for many dogs.
In my clinic, we prescribe a large dose of Acepromazine to be given at home 1 hr before coming to the clinic. It appears that your vet has tried this but the dose is not large enough...this medication, in pill form, has a large margin of safety and very effective at calming Rocky down so your vet can remove this mass.
Talk to your vet about this....
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, XXXXX XXXXX
Thank you so much, Julie, for your kind rating. It is very much appreciated! Even though you have rated, we can still communicate. If you have other questions, please Reply. I am always happy to help.
Have a wonderful day!