How old is too old to pop for gender?

[Sanchez]

Just like the title says, how old would you guys say is too old to pop a snake for gender as oppose to probing? My red tail is close to 6 months old now, and I dont want to potentially injure it if too much time has passed. Thanks.

[llovelace]

Well the older they get, it becomes harder to pop, probing is your best bet.

[alexOATH]

Boas can be somewhat hard to pop as is, better off having someone probe him/her.

[Sanchez]

Thanks guys.