|Doggone it K9 is for the chop|
-Daily Mail, 1980
Indeed this story which I recall extracting from my Grandad's Daily Mail announced that K9 was likely to be written out of the series along with Lala (sic) Ward, although not until after Christmas in order not to upset the nations toy shop owners who had a lot of K9 presents for sale that year.
The BBC needn't have worried. Those Talking K9 toys barely worked anyway!