When you fence in animal mobs (such as Cows and Chickens) and breed them, the baby animals will get out. This seems to happen all the time.

What I expected to happen was...:
The baby mob should stay in the fences and not be able to get out.

What actually happened was...:
After I came back up to my home after mining, I saw that the adult animal mobs were in the fences but the baby animal mobs weren't.

Steps to Reproduce:
1. Make a simple farm with fences surrounding the animal mob on each side.
2. Breed them.
3. Wait for a bit (about 15-20 minutes), I suggest going away from the farm because it happens when I was not there.
4. Go back to the farm and you will see the baby mobs out of the fences.
Note: If the baby mob does escape, it might have grown into an adult while out of the fences.
I created a video, but the size of it was way to high to be uploaded. If you want to see this video, email me at adamhr226@gmail.com and I will reply it back to you. If you do not want me to have your email, I am open to other options on how to get it to you. I do not know how to add in the screenshots of this into here, when I attached the files it could not be opened. If you want to see these, I will include them in the email or if you have another way to get them to you, I will put them in there. Thank you for reading!