Timings look a bit off with the left legs, their up-down phases should be the same as the right ones.  
Here’s what a walk cycle would look like across a 24 frame cycle:  
1__2__3__4__5__6__7__8__9__10_11_12_13_14_15_16_17_18_19_20_21_22_23_24  
FL__________A__B__C__D__E__F__G__H__I__J__K__L__M__N__O__P_  
BR_M_N__O__P_______________A__B__C__D__E__F__G__H__I__J__K__L_  
FR_G_H__I__J__K__L__M__N__O__P_______________A__B__C__D__E__F_  
BL_A_B__C__D__E__F__G__H__I__J__K__L__M__N__O__P______________  
Hoof down on frame A, hoof up on frame P, I think.  
Basically each hoof is down for about 2/3rds of the total cycle.