In our case, we had to tie our dog up for the first several months to avoid further damage of clothing, but eventually most dogs will learn. (second-opinion-doc.com)
If a court decides that the plaintiff has not acted reasonably and has not avoided further damages, then the court will not award the plaintiff further damages. (himpro.ca)
``... it can not be right to visit the authority or owner responsible for a tree with a large bill for underpinning without giving them notice of the damage and the opportunity of avoiding further damage by removal of the tree... as a general proposition, I think that the defendant is entitled to notice and a reasonable opportunity of abatement before liability for remedial expenditure can arise.» (newlawjournal.co.uk)