Sniffer not splooting

version 1.21.50

 

What I expected to happen was...:

I expected my adult sniffer to occasionally spoot and find seeds

What actually happened was...:

My adult sniffer has not splooted or found seeds, and it has been 10+ days.

This is on a Mooshroom island in an area of about 7x20.  They are not attached to leads.

Steps to Reproduce:
1. spawn or hatch sniffer
2. wait for it to grow
3. it should sploot and find seeds but won't