TEACHING YOUR PUP TO JUMP IS GREAT BUT IWOULD NOT GO ANY HIGHER AT 8 MONTHS ITS BONES ARE STILL SOFT & COULD EASLY BREAK MOST AGILITY CLASSES WONT LET A DOG ENROLE UNTIL ITS 18 MONTHS & THEY DONT JUMP ANYWHERE NEAR 4 FT, SO BE CAREFUL GOOD LUCK WITH THE PUP. PRITCH