The Israelites were to take a lamb/goat under one year of age and to sacrifice it. Then they were to take the blood and put it on their doorposts and to also eat the meat.
Ex 12:3-7 (KJV)
3 Speak ye unto all the congregation of Israel, saying, In the tenth [day] of this month they shall take to them every man a lamb, according to the house of [their] fathers, a lamb for a house:
4 And if the household be too little for the lamb, let him and his neighbor next unto his house take [it] according to the number of the souls; every man according to his eating shall make your count for the lamb.
5 Your lamb shall be without blemish, a male of the first year: ye shall take [it] out from the sheep, or from the goats:
6 And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening.
7 And they shall take of the blood, and strike [it] on the two side posts and on the upper door post of the houses, wherein they shall eat it.
And what we find in the archaeological record in Avarice are several sheep and goat burials during the time of the abandonment of the city, many of them under one year old.
A large number of animal burials was found in the palatial precinct, dating to a time during or after the abandonment.The burials include a few dogs and cattle, but the majority consisted of sheep and goats, with more than 30 such burials found in the limited excavations of 200 m north to south in Areas H/III and H/VI.32 Some of these sheep and goats were adults, but most of them died in their first year of life.
https://www.academia.edu/3219636/_2013_ … th_Dynasty
They also were dated to the period of the early dating of the Exodus and not to the late dating.
The fill in the burial pits contained only a few potsherds, probably demonstrating the brief nature with which the burials were performed. However, all of these potsherds date exclusively to the Thutmoside period (Strata d-c, Phases C/3-C/2), as “not a single sherd from the Amarna or Ramesside periods was found” in any of the burial pits.These carefully but quickly performed animal burials support an abandonment of the site during the reign of Amenhotep II. Therefore, all of the datable, archaeological evidence points to an abandonment under Amenhotep II.
https://www.academia.edu/3219636/_2013_ … th_Dynasty
https://debatingchristianity.com/forum/viewtopic.php?p=1078213#p1078213