The Basenji dog is the only dog that is not able to bark.
4
The two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
12
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
Squirrels forget where they hide about half of their nuts.
698
Cats and dogs can hear ultrasound.
350