From him, from Uthman ibn Isa, from Sama’ah, who said:
I asked Imam عليه السلام about the urine of a cat, a dog, a donkey, and a horse. Imam عليه السلام said: "It is like the urine of a human."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 447