drink

I have some 5ml 0.9% saline solutions in my house, to sometimes clean my guinea pigs' eye boogers with cotton swabs. But she always goes crazy to try to eat the swab, I squeezed out some of the saline out of the bottle she liked drinking it and looked for more. Is it safe or beneficial for...

How often do you recommend filling the piggie's water bottle? Only when it's empty, or do you like to change it every day? I like to change Finnian's water daily, but I wanna know what everyone else does!