its grass didnt know where to put it

[Chikochikka]

hey guys i have 2 piggies in a C&C cage and i have them on grass 6 hours a day and when i take them off and put them into there night cage the grass is brown and dead but it grows back quick and nice and green but why does the grass go brown and dead ???

[Petlovr]

Probably becaue they are urinating on it. Their urine is quite strong.