How Pets Help Your Health

for someone who plays neopets … please help: D?
so my health is 13/13, and I know how to get higher in the training school and such. but does not say this when I go to train. No statistic can go over twice the level of your pet (4 * 2 = 8). His statistics are higher today at 13 hit points. Please increase the level of your first pet! ^ ^ ^ So how I can get my health doing this course? or How I can increase my points? Thanks for your help:)
Sorry i do not know do not play neopets again, but I think it is a very fun for kids and such <3
ATTENTION Pet Lovers – Pets Can Improve Your Life • facebook.com/JohnTesh