The Bug:

Mobs killed by trusted foxes don't drop experience or rare drops upon death.

When a tamed wolf kills a mob, the given mob will drop experience along with having a chance of dropping its assigned rare drops upon its death, however, this same concept cannot be seen with trusted foxes, therefore introducing an inconsistency.

Steps to Reproduce:

1. Summon two foxes and breed them using sweet berries.
2. Switch into survival mode and summon a nearby zombie by using using the command provided below.

   /summon minecraft:zombie ~2 ~ ~2 {Health:1f,ArmorItems:[{},{},{},{id:"minecraft:iron_helmet",Count:1b}],Attributes:[{Name:"minecraft:generic.movement_speed",Base:0.0}]}
   

3. While the trusted baby fox is nearby, approach the zombie so that it attacks you.
4. Wait for the fox to notice and begin attacking the zombie.
5. Pay close attention to the contents that the zombie drops upon its death.
6. Take note as to whether or not mobs killed by trusted foxes don't drop experience or rare drops upon death.

Observed Behavior:

Mobs killed by trusted foxes don't drop experience or rare drops upon death.

Expected Behavior:

Mobs killed by trusted foxes would drop experience and would have a chance of dropping rare drops upon death, following the behavior of when tamed wolves kill mobs.