John has 15 snakes * 2 = <<15*2=30>>30 monkeys.
John has 30 monkeys - 5 = <<30-5=25>>25 lions.
John has 25 lions + 8 = <<25+8=33>>33 pandas.
John has 33 pandas / 3 = <<33/3=11>>11 dogs.
John has 15+30 + 25 + 33 + 11 = <<15+30+25+33+11=114>>114 animals.
#### 114