ID ? Possible bone/Teeth from Montana's Prairie Badlands

[JackyFisher]

Any idea would be appreciated, these are on some dirt pile and not together. Thanks!

[Thomas.Dodson]

#1 and #3 look like petrified wood. #2 appears to be a tooth fragment but is modern. What's the scale?

[JackyFisher]

Thanks a lot.    # 3 is about 2 cm wide