dismissable spell that is constant?

[Whos_That]

A player is looking to have a blink dog in the group as a pet. He is looking to make it a bit more combat effective and I was wondering if you can dismiss the blink effect(as you can the spell). If not how would you be able to remove that hindrance but allow teleports such as d.door?

[concerro]

The ability can be turned off and it takes a swift action to turn it back on because it is a constant spell-like ability.

PRD wrote:

Reactivating a constant spell-like ability is a swift action.

[Whos_That]

Thank you soo much :)