What are the side effects of long term use of cephalexin for dogs?

Long-term use of cephalexin in dogs can lead to several side effects, including gastrointestinal issues such as diarrhea, vomiting, and loss of appetite. Prolonged use may also disrupt the normal gut flora, potentially resulting in secondary infections like yeast infections. Additionally, some dogs may experience allergic reactions or develop resistance to antibiotics. It's essential to monitor your dog for any adverse reactions and consult a veterinarian if concerns arise.