I refuse to call it playing favorites because that is not how I see it. I am serving their needs.

Kiara gets more time than Simba & Nala, Nala gets more time than Simba.
Kiara needs more excersize/outlet for energy than Simba & Nala. Nala needs more than Simba.

Simba honestly couldn't care less but, I still bring him out by himself, play with him by himself, etc. Simba & I's daily routine is to go out in the front yard, leashed, want check his pee-mail. He is happy with just that.

Kiara's is playing frisbee in the front yard and swimming.

Nala's is playing off-leash before bed in the front yard, working on heal, sit, stay, come, etc.

Kiara's time is always longer than Simba & Nala's because it takes more for her to get worn out.

Then we always have our together time where we all go crazy inside, outside, etc playing together.