Some pets' movement speed are too slow

Some pets movement speed are too slow, for example ,the skeletal servant of relic dirge of arkovia,og’napesh and so on,we need to increase their movement speed. It is always happen that I run in front, the skeletal servant chases slowly after me,then I meet enemies,my briarthorn and hellhound begin to fight against enemies,the skeletal servant still has a long range with me,my other pets defeat enemies,the skeletal servant just reaches my location.It makes the pets who have a slow speed useless.