Water bottle question

[amon]

I just bought some new bottles, they have bigger drinking tips with bigger balls. The first couple days my rodents doesn't seem to be able to drink out of them. Then I pulled the round metal tube out and found that there are 3 balls. I took out one and then some were ok, but others still couldn't drink. So I took out another ball for those. Now the water comes out too easily and wet the bedding.

Anyone has similar experience? Any advise?

On a more technical side, does bigger tube give less pressure? So the ball is harder to be pushed to the end?

Thanks for any advise.

[Chandler reptiles]

Sounds like you got the type that are for kenneled dogs or other larger mammals.

[amon]

Sounds like you got the type that are for kenneled dogs or other larger mammals.

So they cannot be used by rodents?

[Chandler reptiles]

So they cannot be used by rodents?

Most require to much pressure to operate by rats.