What animal do your sons like? / What is your sons' favorite animal?

[tzfujimino]

Hello.:-D

Are these two sentences below OK?

1. What animal do your sons like?
2. What is your sons' favorite animal?

I think the noun 'animal' should be pluralized:

1. What animals do your sons like?
2. What are your sons' favorite animals?

Thank you.

 

[MikeNewYork]

If there is more than one son, I agree.

 

[charliedeut]

Or more than one animal.