Would an unhatched egg be classed as a live animal when declaring goods being carried? Would it class as a live animal under 72 hours old?

Day-old chicks’ means all poultry less than 72 hours old, COMMISSION REGULATION (EC) No 798/2008 – 1.   

This Regulation lays down veterinary certification requirements for imports into and transit, including storage during transit, through the Community of the following commodities (the commodities):(a)poultry, hatching eggs, day-old chicks and specified pathogen-free eggs; ‘hatching eggs’ means eggs for incubation, laid by poultry; https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1466090952404&uri=CELEX:32008R079

You must follow hatching eggs and chicks marketing standards and guidance on importing and exporting live animals or animal products.

https://www.gov.uk/guidance/hatching-eggs-and-chicks-marketing-standards#exporting-hatching-eggs-and-chicks-from-gb-to-the-eu 

Contact poultry.mailbox@defra.gov.uk if you have any queries. You’ll receive a response within 5 working days.