Hi, yes, these are veterinarian services, like surgery (about 200 US dollars) and other services. The other photo is a prescription of an antibiotic and another drug.
But if it is real is another question, you must chase/investigate the CRMV number of the vet. doctor, verify if it is active and real and other stuff like adress of the clinic, verify the CNPJ (Cadastro Nacional de Pessoa Jurídica) via Receita Federal; check the phone number, give it a call to see if it is real etc
The Telephone prefix 061 means Brasilia - DF (Federal district) area.
Apparently it is real, if this were in Sao Paulo I could verify myself and tell you, I love dogs too.
Cheers