My best friend actually just brought it up yesterday. Take a piece of baler twine in the their mouth and measure it that way. Add half and inch on each side when you remove it and there you go, you have a measurement.
Thanks, that actually works out pretty perfect because her mouth measures 4" that way and adding 1/2 inch to both sides takes it to 5" and the 5" bit looks to me like it fits pretty well
"The times when you have seen only one set of footprints in the sand, is when I carried you..."