一犬 is read as いっけん (ikken) and means one dog.
いっけん
ikken
いちげん
single word
いっか
(one's own) style
いちや
one night
いっしき
same tendency
いちど
temporarily
いっぽう
on the one hand
いったい
one Buddhist image (or carving, etc.)
いちぶつ
penis
いちいん
one person
いっさい
absolutely (not)
ひとくち
one share
ひとめ
complete view