Here is a link to a weight chart.
http://www.chihuahua-land.com/weight.htm
Maybe your sister is bringing him in too soon?
Chis also have the thought in their head that if they have 1 foot on the pad that counts as being on the pad and will miss alot.
http://www.chihuahua-land.com/weight.htm
Maybe your sister is bringing him in too soon?
Chis also have the thought in their head that if they have 1 foot on the pad that counts as being on the pad and will miss alot.