My husband and I strung this roll out (all 100 feet) and cut it in half to make two strips of 3 1/2 feet by 100 feet.  We put it up in February and it is still up (it is July).  We have had a raccoon climb over it and not rip it.  We have had our cats run into it and not rip it.  We have also had our chickens run and fly into it and not rip it.  Those other people who gave this crappy reviews are wrong or they strung it too tight.