We have a difficult time remembering how old our animals are. For the record:

Jackson was born in the summer of 2008. As of now, he is 6 years old.
Daisy was born* in the spring of 2004. As of now, she is 10 years old.
Bramble was born in the spring of 2007. As of now, she is 5 years old.
Rill was born in the fall of  2011. As of now, she is 2 and a half.

*Daisy was born before our family had a computer at home! I found her birthday in The Black Book.