i have a 4 month old black kitten who today fell off an unsecured bookshelf which wasnt HIGH off the ground but reasonable distance ..he AND the shelf came down with a fairly loud n hard crash but it was so quick i didnt really see if it hit him.. hes NOT limping and is eating and drinking fine ( drinkin a lil more than usual since this happened i have noted) and normally hes all over me and non stop purring to the point of bein a tad annoying lol ..but since it happened today he doesnt wanna come to me as usual and is now not purring. do you think i should be worried? sorry if this seems like a dumb q