Our toilet keeps losing water no sign of leaks and the tank is full bowl is empty it did it 2 x this week help

Question

Our toilet keeps losing water no sign of leaks and the tank is full bowl is empty it did it 2 x this week help

Answer 1

Either your dog or cat is drinking from the bowl?  

Answer 2

Sounds like a vent problem, although there should still be some water in the bowl. Flush the toilet and see if the bowl fills normally. Then run the sink and tub faucets. If the water in the toilet bowl moves while the other water is draining, it is a clogged vent pipe. If the bowl is completely empty, there is a crack in the bottom of the bowl and (if lucky) the water is running down into the drain pipe.

Answer 3

Your flapper is leaking and needs replacing.