YOU SAID:
I have four dogs, which I found on my trip to Ireland last summer
INTO JAPANESE
私は去年の夏にアイルランドに行ったときに見つけた4匹の犬を飼っています
BACK INTO ENGLISH
I have four dogs that I found when I went to Ireland last summer
INTO JAPANESE
去年の夏にアイルランドに行ったときに見つけた犬が4匹います
BACK INTO ENGLISH
I have four dogs that I found when I went to Ireland last summer
You should move to Japan!